The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 2010
Filed:
Sep. 09, 2005
Guenter Gerwig, Boeblingen, DE;
Eric M. Schwarz, Gardiner, NY (US);
Ronald M. Smith, Sr., Wappingers Falls, NY (US);
Guenter Gerwig, Boeblingen, DE;
Eric M. Schwarz, Gardiner, NY (US);
Ronald M. Smith, Sr., Wappingers Falls, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An apparatus and method for performing floating-point operations, particularly a fused multiply add operation. The apparatus includes a arithmetic logic unit adapted to produce both a high-order part (H) and a low-order part (L) of an intermediate extended result according to H, L=A*B+C, where A, B are input operands and C an addend. Each H, L part is formatted the same as the format of the input operands, and alignment of the resulting fractions is not affected by alignment of the inputs. The apparatus includes an architecture for suppressing left-alignment of the intermediate extended result, such that input operands for a subsequent A*B+C operation remain right-aligned.